Air treatment apparatus



FIG. 1 is a front and left side perspective view of an air treatment apparatus showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear and right side perspective view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a rear elevational view thereof; and,

FIG. 8 is a top plan view thereof. 

The ornamental design for an air treatment apparatus, as shown. 